58 



THE SKELETON OF THE HORSE 



part. The line of junction of the two parietal bones is marked internally by the 

 internal parietal crest (Crista parietalis interna) . 



The lateral border is beveled and is overlapped by the squamous temporal 



Fig. 35. — Right Pariet.\l Bone of New-born Fo.vl; Dorso-lateral View. 

 1, Junction with opposite bone; 2, junction with interparietal; 3, junction with occipital; 4, junction with squamoua 



temporal; .5, junction with frontal, 



bone, forming the squamous suture (Sutura squamosa). The angle of junction of 

 the lateral and posterior borders articulates with the posterior angle of the temporal 

 wing of the sphenoid. 



Development. — Each parietal bone ossifies in membrane from a single center. 



Fig. 36. — Right Parietal Bone of New-born Foal, Cerebral Surface. 



1, Junction with opposite bone; 2, junction with interparietal; 3, junction with occipital; 4, junction with squamous 



temporal; 5, junction with frontal; 6, edge which concurs with temporal bone in formation of temporal canal. 



In the >'oung foal the central part of the bone is more convex than in the adult and 

 forms a prominence similar to the pronounced tuber parietale of the young child" 

 the external parietal crest is not present, and the external surface is smooth. The 



